Reentrance phenomenon in superconductor/ferromagnet nanostructures and their application in superconducting spin valves for superconducting electronics

Sidorenko Anatolie

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2018-10-26 16:59

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SIDORENKO, Anatolie. Reentrance phenomenon in superconductor/ferromagnet nanostructures and their application in superconducting spin valves for superconducting electronics. In: Fizika Nizkikh Temperatur, 2017, vol. 43, pp. 962-968. ISSN 0132-6414. DOI: https://doi.org/10.1063/1.4995623

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Fizika Nizkikh Temperatur

Volumul 43 / 2017 / ISSN 0132-6414 /ISSNe 1816-0328

Reentrance phenomenon in superconductor/ferromagnet nanostructures and their application in superconducting spin valves for superconducting electronics

DOI:https://doi.org/10.1063/1.4995623

Pag. 962-968

Sidorenko Anatolie¹²

¹ Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu" of the Academy of Sciences of Moldova,
² University of Augsburg

Disponibil în IBN: 16 februarie 2018

Rezumat

In superconductor/ferromagnet layered structures, a Fulde-Ferrell-Larkin-Ovchinnikov-like inhomogeneous superconducting pairing give rise. The singlet and zero-projection triplet components of the pairing oscillate in space, and the presence of interfaces causes interference phenomena. As the result of the interference, the superconducting critical temperature Tc oscillates as a function of the ferromagnetic layer thicknesses or, even more spectacular, reentrant superconductivity appears. Two ferromagnetic layers can be combined with a superconducting layer into a superconducting spin valve. Proper design and choice of the material parameters give possibility to control superconducting Tc manipulating with magnetic configurations in the system. The conditions to get large spin-valve effect, i.e., a large shift in the critical temperature, are reviewed in the article. PACS: 74.78.-w Superconducting films and low-dimensional structures; 74.78.Na Mesoscopic and nanoscale systems; 73.50.-h Electronic transport phenomena in thin films; 74.25.-q Properties of superconductors; 85.25.-j Superconducting devices.

Cuvinte-cheie
Interference phenomena, Superconducting spin valves, Superconducting films and multilayers nanostructures

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